A gender imbalance is
NORMAL. The United States has surplus of 1.3 million men age 0-14. It's not really a problem because men die young or single all the time.
https://www.cia.gov/library/publications/the-world-factbook/... USA Age structure:
0-14 years: 20.2% (male 31,639,127/female 30,305,704)
15-64 years: 67% (male 102,665,043/female 103,129,321)
65 years and over: 12.8% (male 16,901,232/female 22,571,696) (2009 est.)
Sex ratio:
*at birth: 1.05 male(s)/female*
under 15 years: 1.04 male(s)/female
15-64 years: 1 male(s)/female
65 years and over: 0.75 male(s)/female
total population: 0.97 male(s)/female (2009 est.)
China Age structure:
0-14 years: 19.8% (male 140,877,745/female 124,290,090)
15-64 years: 72.1% (male 495,724,889/female 469,182,087)
65 years and over: 8.1% (male 51,774,115/female 56,764,042) (2009 est.)
Sex ratio:
*at birth: 1.1 male(s)/female*
under 15 years: 1.13 male(s)/female
15-64 years: 1.06 male(s)/female
65 years and over: 0.91 male(s)/female
total population: 1.06 male(s)/female (2009 est.)
India:
Age structure:
0-14 years: 31.1% (male 190,075,426/female 172,799,553)
15-64 years: 63.6% (male 381,446,079/female 359,802,209)
65 years and over: 5.3% (male 29,364,920/female 32,591,030) (2009 est.)
Sex ratio:
*at birth: 1.12 male(s)/female*
under 15 years: 1.1 male(s)/female
15-64 years: 1.06 male(s)/female
65 years and over: 0.9 male(s)/female
total population: 1.06 male(s)/female (2009 est.)
China's surplus might be 50% larger than normal, but it's still less than india and not all that far from normal.